Alkenes (AQA GCSE Chemistry Combined Science): Quizzes

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Alkenes
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What type of compound are alkenes?

Hydrocarbons

What is the key structural feature of alkenes?

A \ceC=C\ce{C=C} double bond

How are alkenes produced?

By cracking long-chain alkanes

Are alkenes saturated or unsaturated compounds?

Unsaturated

What is the general formula for alkenes?

\ceCnH2n\ce{C_nH_{2n}}

What is the molecular formula of ethene?

\ceC2H4\ce{C_2H_4}

What happens when an alkene is shaken with bromine water?

It turns from orange to colourless

What happens when an alkane is shaken with bromine water?

It stays orange

Are alkenes more or less reactive than alkanes?

More reactive

Why are alkenes more reactive than alkanes?

The double bond can break easily

How many hydrogen atoms do alkenes have compared to alkanes?

Fewer hydrogen atoms

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Hydrocarbons: Fuel & Feedstock

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